一种GNSS双频信号跟踪的新方法

在双频接收机双频L1辅助L2跟踪方法基础上提出一种GNSS双频信号载波和差联合跟踪新方法。该算法能够克服传统的L1辅助L2跟踪方法L2信号能得到L1信号辅助信息、而L1信号得不到L2信号任何辅助信息的固有缺点。仿真结果表明：该和差联合跟踪方法相比传统的双频信号跟踪算法能够耦合双频信号实现其相互辅助跟踪，具有提高GNSS双频信号的跟踪稳健性和灵敏度等优点。

A New Algorithm for GNSS Dual-Frequency Signal Tracking

The purpose of this work is to design a new algorithm for GNSS dual-frequency signals tracking, which is called the sum-diff joint tracking algorithm in this paper. The sum-diff joint tracking algorithm is based on the dual-frequency L1-assisted-L2 tracking method. The carrier sum-diff joint tracking algorithm can overcome the inherent shortcomings in traditional dual-frequency L1-assisted-L2 tracking method that the L2 signal tracking can get assistant information from the L1 signal tracking, but the L1 signal tracking cannot get any assistant information from the L2 signal tracking. The simulation results show that sum-diff joint tracking algorithm can couple dual-frequency signals in the carrier tracking loops and can make dual-frequency signals assist each other to achieve their tracking, and it significantly improves robustness and sensitivity in the GNSS dual-frequency signal tracking.